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Materials to the distribution of rare and interesting species of Pteridophyta in the Opole Plain (SW Poland). Fragmenta Floristica et Geobotanica Polonica 10: 209–220. Kraków. PL ISSN 1640 629X. ABSTRACT: This paper presents the new localities, conditions of occurrence and numerical force of 10 rare and interesting species of Pteridophyta from the Opole Plain in the SW Poland.